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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 20722–20729

A new balanced-path heterodyne I/Q-interferometer scheme for low environmental noise, high sensitivity phase measurements for both reflection and transmission geometry.

Seunghyun Yoon, Youngkyu Park, and Kyuman Cho  »View Author Affiliations

Optics Express, Vol. 21, Issue 18, pp. 20722-20729 (2013)

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A new heterodyne interferometer scheme which has open accesses to both the geometrically balanced probe beam (PB) and reference beam (RB) paths, for which, depending on the nature of a specific sensing mechanism, a transmission geometry or a reflection geometry can be employed, is presented. We will show that, because of a small separation between the short length PB and RB running parallel to each other our newly proposed optical arrangement allows high rejection of unlocalized environmental perturbations. In fact, the geometrically balanced optical arrangement provides 19dB rejection of any vibrations parallel to the direction of beam propagation, which cannot be achieved in a conventional interferometer scheme. Applications of this new interferometer scheme are discussed. As an example, we will show that our newly proposed interferometer scheme can be applied for high sensitivity measurements of concentration dependent refractive indexes in various solutions.

© 2013 OSA

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 5, 2013
Revised Manuscript: August 8, 2013
Manuscript Accepted: August 19, 2013
Published: August 28, 2013

Seunghyun Yoon, Youngkyu Park, and Kyuman Cho, "A new balanced-path heterodyne I/Q-interferometer scheme for low environmental noise, high sensitivity phase measurements for both reflection and transmission geometry.," Opt. Express 21, 20722-20729 (2013)

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